Dolmar MS-250.4 - Manual (Page 24)

23
EMISSION COMPLIANCE PERIOD
For handheld engines : The Emissions Compliance Period referred to on the
Emissions Compliance label indicates the number of operating hours for which
the engine has been shown to meet Federal emission requirements.
Category C=50 hours, B=125 hours, and A=300 hours.
Air Index and durability period information
The Air Index Information hang-tag for this engine is provided in accordance
with the California emission regulations.
The graphical representation of the Air Index on the hang-tag shows the
emissions performance of this engine, and can be used to compare the
emissions performance with other available engines.
The lower the Air Index, the less pollution.
Note: Remove the hang-tag before operating the engine.
The Emissions Durability Period referred to on the hang-tag indicates the
number of operating hours for which the engine has been shown to meet the
California emission requirements.
Descriptive term Applicable to Emissions Durability Period
Moderate 50hours (0-80 cc, inclusive)
Intermediate 125hours (0-80 cc, inclusive)
Extended 300hours (0-80 cc, inclusive)